hi mate,
my first interview was with the agent witch was basicaly going through my cv and assesing what level I was at, all very informal more of a long chat, the employer then checked out my last 3 job references, then when I recieved the job offer I had a 45 min interview over skype with the owners, again more of an informal chat. very relaxed and nothing to get worried about,
I am lucky as my employer is paying for the visa, but when I was offer a job through TSS I would of had to pay for the visa and agencie fees of around £2500
All i had to do was send all my documents to the agent and they delt with the whole visa application for me, I have just had to sort out health insurance, now im just waiting to hear back form DIAC